Variable-speed mechanism.



No. 638,359. Patented rm. 5,1899

, w. L. SCHELLENBACH.

VARIABLE SPEED MECHANISM.

(Application filed May 2, 1899.)

(No Model.) A; 2 Sheets-$heet l.

N0. s3s,s59.- Patented Dec. 5, i899.

W, L. SCHELLENBACH. VARIABLE SPEED MECHANISM.

(Application fixedma 2, 1899.)

(No Model.)

2 SheetsSheet 2 UNITED STATES \VILLIAH L. SCHELLENBACI'I, OF PHILADELPHIA, PENNSYLVANIA.

VARIABLE-SPEED MECHANISM.

SPECIFICATION forming part of Letters Patent N 0. 638,359, dated December 5, 1899.

Application filed May 2, 1899. stint No. 715,288. ca model.)

To all wl'tom it 'llL-(ty concern-.-

Be it known'that I, WILLmn L Scum.- LENBAOH, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in Variable-Speed Mechanism, which improvement is fully set forth in the following specification and accom panying drawings.

My invention consists of a novel construction of a variable-spced mechanism, as hereinafter fully set forth and claimed.

Figure 1 represents an end elevation of a variable speed mechanism embodying my invention. Fig. 2 represents a section on line so {I}, Fig. 1, certain of the parts being shown in elevation. Fig. 3 represents aside elevation, partly in section, of the parts seen in Fig. 1. Fig. 4 represents a partial plan view of Fig. 3. Fig. 5 represents an-end elevation of an engine-lathe having my invention applied thereto. .Fig'. 6 represents a front elevation of Fig. 5, showing certain of the parts broken away or in'section.

Similar letters and numerals of reference indicate corresponding parts in the figures.

Referring to the drawings A designates a main driving-shaft or initialsource of power which revolves in suit-able bearings and is provided with a reduced portion which revolves in a bearing 13 in the center of housing 13*.

C designates a spur-gear which is keyed to and slips onto portion C of the shaft A and is adapted to mesh with a pinion D, which is keyed to slip over the clutch member E. the latter being bored to receive the stem 'F and pinned thereto, the stem F being mounted in thesleeveorbushingII,which has the flange J, which is located in the recess K, said flange having one end of theispring L contacting therewith, while-the other extremity thereof abuts againsta wall of said recess, whereby the clutch'member E is always held in contact with the juxtaposed clutch member M.

N designates a boss in which the sleeve H is supported, said boss being a part of the arm P, which is provided with anopening Q, through which passes the reduced portion C of the main shaft A. The diameter of the reduced portion C -of said main shaft A is made to correspond with the diameter of said clutch member E in order to provide a means of changing the position of gears C and I) in Figs. 1 and 1?,gearC being the driver and gear D the driven. These conditions may be reversed and gear D be placed on reduced portion C of said shaft-A and gear 0 slipped onto clutch member E, which operation makes gear D the driverand gear C the driven. Thus two variations. of speed are producer] by changing the position ofgears and D. When it is desired to change the position of gear C D, the arm P is adapted with a plunger or locking device R, which may be withdrawn from the groove S in reduced portion C of said shaft A, thus permitting said arm P to be removed from reduced portion (3* of shaft A. When the arm I is in the position shown in Figs. 1 and 2, the plunger or looking device R is provided with a tongue engaging the groove S, whereby lateral motion of the arm P relative to said groove is prevented.

T design-ates a spring mounted ina suitable recess, one end of said spring contacting with the plunger R, while its opposite end'abuts against the plug U, through which passes the stem V,the latter being provided with a thumb-piece or head \V. The housing B is provided with a plurality of bearings X, in which are located the clutch members M, the

extension of the latter serving as bearings for the'gears employed,the same being designated by the pitch-circles Y 7. A ll C D E F, it beingunderstood that the pitch-circles of said gears are of different diameters, as will be understood from the dotted lines'in Fig. 1, said gears being held in position'in the housing B by means of the plate G. Each of the gears Y Z A II C D E F is provided with a recessed face 11', as will be understoodfrom shown provision made for the employment of a ninth variation of speed through the medium of the gear N, said gear being seen in shaft or rod and variable-speed transmission shaft A, a counter-shaft L, a housing B latter, a series of gears varying in size located move laterally within said pinion, a driven devices intermediate said clutch memberand said driven shaft or rod 8. In a variable-speed mechanism, the combination of astud-plate, a driving stud-gear 1, the transmitting-gear 2 secured to the slotted stud-plate Y, a sleeve-stud A, a rotating housing, a sleeve-gear passing through the in said housing-,agearsecnred to said sleevegear and meshing with a pinion carried by a stem which has its bearing in rotating arm I, a clutch member upon said stem adapted to engage anyone of the various-sized gears, contaiued within said rotating housing, a shaft having a clutch B keyed to slide thereon and adapted to be engaged with any one of the various-sized gears contained within said housing.

9. In a variable-speed mechanism, a main mounted on said main shaft,a pinion C mounted on the portion CSof said main shaft,an arm P also mounted on said portion 0", means for preventing lateral shifting of said arm, a

spring-pressed clutch member and pinion cari-iedjb'ysaid arm, a plurality of intermeshing gears carried in said housing, an inner pinion N also located in said housing, a toothed ring R supported in said housing and means for transmitting power from said pinion and ring to the desired point. p

10. ,In a variable-speed mechanism, rotatable driving and driven members, a plurality of gears of different diameters geared together to rotate-i-n. unison at all times, means for gearing any one of said gears to one of said members, and means for gearing any one of said gears to the other of said members.

11. In avariable-speed mechanism, ashaf t, a plurality of gearsof dilferent diameters-suit ably mounted around said shaft, said gears being geared together to rotate in unison at all times, gearing driven by said shaft, means for connecting one member of said last-mew tioned gearing with any one of said plurality of gears, a counter-shaft, and means for connecting any one of said plurality of gears with said counter-shaft.

WILLIAM L. SOHELLENBACH. Witnesses:

JOHN A. WIEDERSHEIM, WM. 0. WIEDERSHEIM. 

